I think that the answer is B. Our chance to leave a legacy is quite brief.
i like it it looks good
<u><em>THUMBS UP</em></u>
The rule about subjects joined by 'and' is that there must be a subject-verb agreement. This means that if the subject is singular, then the verb must be also singular. On the other hand, if the subject is plural that means the verb must also be plural.
1. The other day, Swami (was) late for school.
2. Swami's father knew that Swami (told) a lie.
3. Samuel punished Swami because Swami (provoked) him.