What does the Digit Discard Instruction of PreDot do to the pattern 9.2148134444?

A.
Prefix a 9 before the ‘.’ of none is dialed.

B.
Discard 2148134444 and send the 9 access code.

C.
Only collect the first four digits counting right to left.

D.
Change it to 2148134444 before presenting it to the PSTN.