Answer: option A) ''You must eat breakfast everyday,'' said the doctor, ''or you'll not be able to concentrate.''
Step-by-step explanation:
The given statement is made by a doctor, and reported by a 3rd person. Also, it contains two related thoughts by the doctor. Thus, there is a main clause, and a subordinate (joining) clause
Main clause: "You must eat breakfast everyday"
Subordinate clause: "or you'll not be able to concentrate"
The TWO clauses must then be in quoted form (" "), EXCEPT from the phrase 'said the doctor'. So, the answer is option A