问题
单项选择题
Software Engineering Economy is an effective part of software engineering, which of the following content is the research comtent of software engineering economy Ⅰ．Estimation of software development cost Ⅱ．Earn & Cost analysis of software development Ⅲ．Adjustment of software development progress
A． Ⅲ only
B． Ⅱ and Ⅲ
C． Ⅰ and Ⅱ
D． all
答案
参考答案：C