In fopen(), the open mode "wx" is sometimes preferred "w" because. 1) Use of wx is more efficient. 2) If w is used, old contents of file are erased and a new empty file is created. When wx is used, fopen() returns NULL if file already exists.

In fopen(), the open mode "wx" is sometimes preferred "w" because. 1)

1.	In fopen(), the open mode "wx" is sometimes preferred "w" because. 1) Use of wx is more efficient. 2) If w is used, old contents of file are erased and a new empty file is created. When wx is used, fopen() returns NULL if file already exists.
A.	Only 1
B.	Only 2
C.	Both 1 and 2
D.	Neither 1 nor 2
E.
Answer» C. Both 1 and 2