What is this announcement for vs. whom is this announcement for?

[Torsten]

Hi, I've just come across the following exercise in the New TOEIC prep book by Barron's:

What is this announcement for?
A) Schoolteachers.
B) Schoolchildren.
C) Volunteer tutors.
D) Businesspeople.

Why is the question word 'what' and not 'who' or 'whom'?

Thanks,
Torsten
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Jamie (K)]

Yes, the question should say "who" or "whom". This is obviously part of a long tradition of bad mistakes in English test prep books.