_Consider the following statements:Automatic signalling system results in 1. greater risk 2. higher efficiency3. avoidance of block instruments4. higher operating cost Of these statements$?

_Consider the following statements:Automatic signalling system results

1.	_Consider the following statements:Automatic signalling system results in 1. greater risk 2. higher efficiency3. avoidance of block instruments4. higher operating cost Of these statements$?
A.	I and 2 are correct
B.	3 and 4 are correct
C.	1 and 4 are correct
D.	2 and 3 are correct
Answer» E.