Mashaal Masha
Farouk El-Baz, a geologist and space scientist, ________ part of the team that selected the lunar landing sites for the Apollo program during the 1960s and 1970s.

Which choice completes the text so that it conforms to the conventions of Standard English?
Difficulty: Easy
A: 

are

B: 

was

C: 

have been

D: 

were

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