[单选题]

The following suggestions increase program's(73)and make them easier to(74):
Use a standard indention technique, blank lines, form. feeds, and spaces.
Insert plenty of comments into your code.
A．security
B．reliability
C．readability
D．usability

The following suggestions increase program's(73)and make them easier to(74):Use a standard indention technique, blank lines, form. feeds, and spaces.Insert plenty of comments into your code.A．securityB．reliabilityC．readabilityD．usability