Nhận biết (M1)

While researching a topic, a student has taken the following notes:

• • Lighthouses send out crucial light signals to help ships and other watercraft navigate at night.

• • Before automation, lighthouses were run by lighthouse keepers.

• • Betsy Morrow Humphrey was the lighthouse keeper at Monhegan Island Light in Maine.

• • She held this position from 1862 to 1880.

• • Thelma Austin was the lighthouse keeper at Point Fermin Light in California.

• • She held this position from 1925 to 1941.

The student wants to emphasize a difference between the two lighthouse keepers. Which choice most effectively uses relevant information from the notes to accomplish this goal?

• A.

  As the lighthouse keeper at Point Fermin Light, Thelma Austin helped watercraft navigate at night.

• B.

  From 1862 to 1880, the nighttime waters of Maine were made more navigable thanks to Betsy Morrow Humphrey.

• C.

  Betsy Morrow Humphrey worked as a lighthouse keeper in an earlier century than did Thelma Austin.

• D.

  Betsy Morrow Humphrey and Thelma Austin both played crucial roles in ensuring safe navigation for watercraft in past centuries.