Find the Acute Interior Angle of the Parallelogram Formed By A

Multiple Choice

Find the acute interior angle of the parallelogram formed by $A ( 1 , - 1,2 )$ , $B ( 6,0,4 ) , C ( 7,1,9 )$ , and $D ( 2,0,7 )$ . Round your answer to two decimals.

A) $34.21$
B) $39.59$
C) $55.79$
D) $1.67 ^ { \circ }$
E) $43.15 ^ { \circ }$