Filariform larva penetrates skin, enters the circulation and breaks out of the capillaries into the lung, which may cause bronchitis

 The fossil beds at the Falls of the Ohio, located between Louisville, Kentucky and Clarksville, Indiana, are world-renowned. There are 212 species of corals known found in these fossil beds. Consider the environmental conditions under which most coral lives. Which scenario MOST LIKELY describes the ancient environment of the Falls?

Where are the following

Ithink the answer is b
not sure