Suppose the Price of Capital and Labour Remain Constant but That

Suppose the price of capital and labour remain constant but that the average educational level of workers has increased and therefore, productivity of labour increases.This would lead a firm

A) to adopt a more capital-intensive production technology.
B) to adopt a more labour-intensive technology.
C) to keep its output and production technology unchanged, but to use fewer units of labour.
D) to use only labour to produce the product.