Plural Sub{Computers and mobile devices}
Verb{are} enemies of a good night’s sleep,
Modifier{interrupting slumber with text alerts and disrupt natural sleep rhythms with
pronoun{its} glowing blue screens}.
SV Pair : Computers and mobile devices & are both are plural, So they agree.
Subject - Pronoun must Agree rule is violated as
its represents Computers and mobile devices. They don't agree, So
its must be replaced with
their.
Verb Tense : Simple Present as it is a fact (No issues)
Modifier :
Verb+ing modifier with
, is also modifying the entire clause. (No issues)
So by eliminating the choices A,B,E based on Sub-Pronoun must agree rule.
We are left with C,D.
to interrupt does't agree with the clause.
Hence I think
D is the right choice.
A. interrupting slumber with text alerts and disrupt natural sleep rhythms with its glowing blue screens.
B. interrupting slumber with text alerts and disrupting natural sleep rhythms with its glowing blue screens.
C. to interrupt slumber with text alerts and disrupt natural sleep rhythms with their glowing blue screens.
D. interrupting slumber with text alerts and disrupting natural sleep rhythms with their glowing blue screens.
E. interrupting slumber with text alerts but disrupting natural sleep rhythms with its glowing blue screens.