Suppose that nation 1 have 400 units labor L and 20 units capital K , nation 2 have 300 units L and 100 units K and commodity X is labor- intensive commodity , Y is capital-intensive commodity. Before trade between nation1 and nation2, PX/PY in nation 1 is ( ) than PX/PY in nation2. PX is the price of X and PY is the price of Y.
选项：

A:higher
B: lower
C:same