Other things remain equal, which of the following factors causes the market supply curve of Blue-ray players to shift leftwards? a. The costs of producing a single Blue-ray plaver increases.
b. The number of firms selling Blue-ray players increases.
c. The sellers are expecting the price of Blue-ray players to decline in the soon future.
d. Non of the above factors causes the market supply curve of Blue-ray players to shift leftwards

a. The costs of producing a single Blue-ray plaver increases.

Explanation:

Supply curve represents a relationship between the the quantity of a good produced and the price of the good.

In this scenario if the cost of input of or other factors of production increases, the supplier will be forced to increase the price of BluRay CDs while reducing the quantity.

The marginal cost increases resulting in an increase in total cost of BluRay.

This is represented by a shift in supply curve to the left

In this question, it is given that WQ is congruent to MK and WK is congruent to MQ . And we have one more pair, that is the pair of common side, which is KQ congruent to KQ. So we have three pairs of congruent sides here, So the two triangles are congruent by SSS that is side side side congruency. ANd hence, the correct option is A .