Answer:
" As of today, television is immediately off-limits, for a week—in fact, consider yourself "unplugged" from ALL electronics, which should help you focus on your homework."
Step-by-step explanation:
The above chosen answer is more correctly punctuated than any other sentence from the options.
There should be a comma after "As of today" and also after "off-limits"(since the person adds "for a week" as additional information)
"in fact" should have a hyphen before it as it shows continuation of thought which is still part of the sentence. Notice that "ALL" is capitalized to indicate emphasis