That ball bolted by so fast 19 it was like a lightning strike in line 19 the word bolted means a) attached. b) locked. c) screwed. d) sped.

The correct answer is D NOT C. If you supplement the word screwed for bolted, the sentence just doesn’t make sense. However, using the word sped makes sense as it using the key words “so fast” and “like a lightning strike” symbolizing that it quick or speedy. Hope this helps! :)

The summary of this passage would be more clear if it included the detail that there was a dead virus living inside the monkey. This would make it seem far less random that there is a sudden mention of a monkey without context. 

The central idea should also include the phrase "and spread throughout the human species" so that the idea of why a virus coming alive would be scary.