Goods X and Y are perfect substitutes. When the market price of good X is$5/unit, firm F produces 500 units of X. When the price of Yrises, 100 consumers of Y shift to the consumption of good X. This causes industry analysts to think that firm F will increase quantity supplied of X to match this increased demand.

This conclusion is flawed because

A.

it assumes that firm F is the only producer of good X.

B.

it assumes that firm F does not export good X.

C.

it assumes that the price of X will not increase in the near future.

D.

it assumes that firm F does not export good X.

E.

it assumes that the supply curve of X will shift to the right in response to the increased demand

please tell me why