单选题 After receiving two major clothing orders in a single month, Zeus Couture's manager decided to invest in several sewing machines to increase its______.
【正确答案】 B
【答案解析】解析：根据上下文语义，此处意为“为提高生产力决定投资一些缝纫机”，因此名词(B)productivity(生产力)为正确答案。(A)affordability意为“支付能力”，(C)subjectivity意为“主观性”，(D)attainability意为“可达性”。