Answer:
I think it is D.) Scientist have spent years trying to determine how tsunamis can be predicted with greater accuracy.
Explanation:
Words like ain't, you guys, or y'all would not be worlds you would want to put in a formal style or tone.
So, words such as determine, predicted, and greater accuracy, are formal in a way. Just think of it this way, the sentence would sound as if someone who was smart was speaking or someone who is very FORMAL.
I hope this helped you ; )
the letter c is the right answer and thw best
A comma indicates a pause between the ending of an introductory word, phrase, or clause, and the beginning of the main part of the sentence.
# A comma is used before any coordinating conjunction (and, but, for, or, nor, so, yet) that links two independent clauses. ....
#It is also used after a dependent clause that starts a sentence. ...
#Commas also used to offset appositives from the rest of the sentence. ...
#They are used to separate items in a series. (this is the most commonly used)
The answer is C - exists in thought or as an idea, but does not have a physical existence.
