Explanation is in a file
bit.
ly/3a8Nt8n
This is true. You shouldn't split your infinitives unless necessary for grammatical reasons, while splitting them to add a modification in the middle creates a weird, awkward sentence.
The answer to your question is 53
The answer is B.
To fully memorize a material you need to first understand it never try to memorize something you don’t completely understand.
:)