How Does the Enzyme 5'-Monophosphate-Dependent Terminator Exonuclease (TEX) Distinguish Between

How does the enzyme 5'-monophosphate-dependent terminator exonuclease (TEX) distinguish between bona fide start sites in primary transcripts and those resulting from internal RNA cleavage?

A) TEX hydrolyzes processed transcripts from their 5'-ribonucleotide monophosphates.
B) TEX hydrolyzes primary transcripts from their 5'-ribonucleotide monophosphates.
C) TEX hydrolyzes RNA starting from a primary transcript's 5'-7-methylguanosine cap.
D) TEX hydrolyzes processed transcripts from their 5'-ribonucleotide triphosphate 5'-ends.
E) TEX hydrolyzes primary transcript from their 5'-ribonucleotide triphosphate 5'-ends.