How is this situational irony

How does this image the reader to understand seismographs?

Which of these sentences exhibits proper usage? a. many doctors affiliated with university hospital expressed concern about the policy (moore 5). b. many doctors affiliated with university hospital expressed concern about the policy (moore 5). c. many doctors affiliated with university hospital expressed concern about the policy (moore 5). d. many doctors affiliated with university hospital expressed concern about the policy (moore 5).

Read the passage below and answer the question. marcus had a reputation for being craven. no one had ever seen him do a single brave thing. using context clues, how would you define the word craven in the passage? intense courageous cowardly thoughtful