I think the answer is letter d. cause and effect
Answer:
Abraham Lincoln delivered his second inaugural address on Saturday, March 4, 1865, during his second inauguration as President of the United States
Explanation: i read it in my history book
I would say yes, in case of emergency. of course there could still be rules for phones. as long as students are still paying attention in class and not being disruptive or disrespectful, i don’t see the problem.