GCC Compiler Question: Download Linux GCC Compiler PDF

Which option of gcc enables compiler's all warning messages?
a) -Wall
b) -War
c) -Warn
d) none of the mentioned

a) -Wall

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Which option of gcc links with a library file? a) -l b) -L c) -link d) none of the mentioned	Which option of gcc adds include directory of header files? a) -i b) -I c) -e d) -E