Solve the triangle. a =50, B=90%, c =5 O A. Y= 40, a= 6.96, b= 7.78 O B. Y= 40, a =7.78, b=5.96 O C. Y= 40, a= 5.96, b =7.78 O D. Y= 40, a = 8.78, b=5.96