Please include an explanation (thanks!!!)

Which of the following specify the current working directory on the user's PATH even if the user does a change directory (cd) from their current directory.

A. PATH=/usr/bin:/usr/local/bin

B. PATH=/usr/bin::/usr/local/bin

C. PATH=/usr/bin:$PWD:/usr/local/bin

D. PATH=/usr/bin:/usr/local/bin:

E. PATH=/usr/bin:.:/usr/local/bin

F. PATH=:/usr/bin:/usr/local/bin

G. PATH=/usr/bin:`pwd`:/usr/local/bin

	1.	B, D, E, F
	2.	B, C, D, E, F, G
	3.	A, B, C, D, E, F, G
	4.	E
	5.	B, C, D, F, G