Prejudice must not obstruct access and opportunity.
Equal treatment requires distinguishing legally relevant reasons from prejudice. Disability must not simply serve as a blanket reason to treat someone worse. In addition to the Basic Law, legislation specifies protection in particular areas of life.
Equal participation can require different forms of support. The Federal Disability Equality Act addresses reasonable accommodation at the public bodies it covers. A necessary adjustment can make equality possible, rather than give someone an unfair advantage.

The other three answers
The other answers replace or distort the protective right.
You may discriminate against other people if there are sufficient personal reasons.
Personal dislike or prejudice is not a general licence to discriminate. Whether different treatment is permissible depends on the applicable legal rules.
No one may sue people if they have been discriminated against.
A general ban on bringing a claim would undermine effective legal protection. For example, the Equal Treatment Act provides possible compensation and damages claims in employment.
It is law for everyone to donate money annually to disadvantaged groups.
Equal treatment does not mean a general annual donation requirement. Voluntary help and enforceable protective rights are different things.
Equal treatment does not mean treating every situation identically.
A distinction with a factual and legal justification is not automatically prohibited discrimination. Equally, a pretext must not defeat protection. A concrete assessment depends on the area of life and the applicable law.
Fundamental rights bind state action. Protection in employment and other private relationships covered by legislation is developed, among other laws, through the Equal Treatment Act. Not every provision operates identically everywhere.
Article 3 · Equality · Basic Law ↗Equal treatment protects rights; it is not a donation rule.
Look for the answer that prevents unjustified disadvantage. Accessibility and suitable support can serve that goal.
Three words for this question
- die Benachteiligungdisadvantage or discrimination
- Being treated worse, for example in accessing an opportunity.
- die Teilhabeparticipation
- The opportunity to take part in society.
- die angemessene Vorkehrungreasonable accommodation
- A suitable adjustment enabling rights to be exercised equally.
