A. m<1 =

B. m<2 =

C. m<3 =

D. m<7 =

A transversal is a straight line that intersects two parallel lines, as such producing a series of corresponding angles. Therefore from the given diagram, we have;
A. m<1 =
(corresponding angle property to angle 5)
B. m<2 =
(corresponding angle property to angle 6)
C. m<3 =
(vertical opposite angle to angle 1)
D. m<7 =
(vertical opposite angle to angle 5)