Quadrilateral A B C D has A B=B C=C D, \angle A B C=70^{\circ}, and \angle B C D=170^{\circ}. What is the degree measure of \angle B A D ?

**Answer Choices**

A. 75

B. 80

C. 85

D. 90

E. 95

Quadrilateral A B C D has A B=B C=C D, \angle A B C=70^{\circ}, and \angle B C D=170^{\circ}. What is the degree measure of \angle B A D ?

**Answer Choices**

A. 75

B. 80

C. 85

D. 90

E. 95