Which is an example of dramatic irony, or knowledge that readers have but characters do not?

A Tom appears reluctant to allow Ben to paint the fence.
B Tom is commanded by Aunt Polly to paint the fence.
C Tom runs out of whitewash for the fence by mid-afternoon.
D Tom collects items from several boys who want to paint.

The answer is D Tom collects items from several boys who want to paint.

Explanation:

research question: do the predicted benefits of genetic enhancements outweigh the possible negative consequences of this technology?  

what information do i need to research in order to answer this question?  

-predicted benefits of genetic enhancements

-negative consequences of genetic enhancements

-existing, if any, consequences of the new technology

-possible consequences if the technology is perfected

what sources will have the information?

-scientific research documents or news articles summarizing research

-articles in science and medical journals, magazines, and electronic databases

-books

-experts at genetics: geneticists, scientists, professors

here you go have a nice day

the positive connotations of the words "pretty," "quiet," and "silence" give the excerpt a tone of nervousness. i think its this