IMO D.
Here the sentence is in the Subjunctive mood. So, verbs must be in base form.
Base forms are "account" and "manage".
Account for - To keep a record of how money has been spent.
As "and" is present in the sentence, we can split it into two sentences to check for the correct answer.
A. account and manage- account all of their expenses || and manage all of their expenses. The idiom related to account suitable here is account for.
B. accounted for and managed
...
Here the sentence is in the Subjunctive mood. So, verbs must be in base form.
Base forms are "account" and "manage".
Account for - To keep a record of how money has been spent.
As "and" is present in the sentence, we can split it into two sentences to check for the correct answer.
A. account and manage- account all of their expenses || and manage all of their expenses. The idiom related to account suitable here is account for.
B. accounted for and managed
...
