GAUSS8 2018 Problem 20

Line segments P Q and R S are parallel. Points T, U, V are placed so that \angle Q T V=30^{\circ}, \angle S U V=40^{\circ}, and \angle T V U=x^{\circ}, as shown. What is the value of x ?

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Answer Choices
A. 80
B. 85
C. 65
D. 70
E. 75