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Mathematics compulsory four 45 answers
Answer d

First of all, it is necessary to clarify which angles each set represents.

There are -360 to -270, 0 to 90, 360 to 540 and so on in A.

There is obviously only an angle of 0 to 90 degrees in B.

There are many C, as long as it is less than 90 degrees, such as 45 degrees 0 -35 degrees and so on.

Look at the options again, then A must be wrong.

The angle of 360-540 degrees in the b option set A does not belong to the set C, so the set A is not included in the set C, no.

The angle from-360 to-270 in C option set A is obviously not equal to set B, which is also wrong.

The statement of option D is that set B is included in set C, which is obviously correct, and the acute angles are all less than 90 degrees.