16. The instruction “If it’s raining outside, then take an umbrella to work” is an example of the _____ structure,

A. Control
B. Repetition
C. Selection
D. Sequence
E. Switching

17. At the time of system study, flowcharts are drawn using

A. non-standard symbols
B. general symbols
C. abbreviated symbols
D. specific symbols
E. None of the above

18. Programmers use _____ to organize and summarize the results of their problem analysis.

A. Flowcharts
B. Input charts
C. IPO charts
D. Output charts
E.  Processing charts