Capital and Labor Are Similar in the International Political Economy

Capital and labor are similar in the international political economy because:

A) they are usually concentrated in the same country.
B) both factors typically organize against liberalization of goods.
C) they are typically immobile as factors of production.
D) they both can easily overcome the collective action problems they face domestically due to their small groups.
E) they are both likely to move toward places that are scarce in their endowment.