【单项选择题】
What these young men were doing()a threat to the safety of the whole neighborhood.
A、A.constructed
B、B.contracted
C、C.constituted
D、D.contributed
A、A.constructed
B、B.contracted
C、C.constituted
D、D.contributed
A、A.Even he is young B、B.Young though he is C、C.In spite of he is young D、D.Young is as he