【答题库最新整理国开(电大)人文英语3-1379网上形考机考题库】The company is trying every _____ to improve the quality of products.

【答题库最新整理国开(电大)人文英语3-1379网上形考机考题库】The company is trying every _____ to improve the quality of products.
选择一项：
A. meaning
B. means
C. mean
译文：这家公司正在想尽一切办法提高产品质量。