Section: Critical Reading Section 2

97) Among the great moments of the twentieth century, the toppling of the Berlin Wall by East Germans (1)are (2)probably seen by (3)them as one of the (4)most felicitous.

1. are
2. probably seen
3. them
4. most felicitous
5. No Error

The plural noun Germans is close to the verb but is not
the subject. The subject toppling is singular, and so are should be the singular is.