All squares are rectangles. Is this statement true or false?

A. TRUE

In a group of animals, there are cats, dogs, and birds. If all cats are mammals and all dogs are mammals, which of the following statements is true?

C. NO BIRDS ARE MAMMALS

Every triangle has three sides. Is this statement true or false?

A. TRUE

Five people are sitting in a row. A is to the left of B but to the right of C. D is to the right of A. Who is sitting in the middle?

A. A

Find the missing letter in the series: b, d, f, h, ?

A. J