Answer:
A) Nighttime was approaching.
Explanation:
Nighttime was insinuated, but not bluntly or plainly shown. Implicit means "Implied though not plainly expressed." SO if we look at the passage and the multiple-choice questions we see that B, C, and D, were all plainly expressed. They were given a signal, as well as were "explicit" because they didn't hide any information. The only information we have that "nighttime was approaching" would be that the "sky was getting dark."
C, because "butterfly chaser" seems to point to his opinions on nature.
(a) My mother and I <u>are </u> delighted to see
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