Choose the verb or verb phrase that correctly completes the sentence.

Weather can be unforgiving, even to entertainers. To please fans, a musical group sometimes _______ their safety at risk to perform in bad weather. For example, the pop group ABBA performed in the rain in 1977. The rain caused one of the members, Frida, to slip on the stage.
A.
puts
B.
put
C.
is putting
D.
has put