I believe the answer is A). Smart phone
Most people are comfortable with the idea of a noun, but they may not feel so confident when it comes to the noun clause. A noun clause is a group of words acting together as a noun. These clauses are always dependent clauses. That is, they do not form a complete sentence. Take a look at some sample sentences containing noun clauses to understand their purpose and function.
Wanted. Imagery is wanted
Answer:
A
Explanation:
B doesn't make sense because Lamar is preparing for the DISSCUSION, not the roles.
C that's cheating.
D they are supposed to be making money for the food bank which is a good idea.
Count nouns:book, umbrella,friend
non-count: knowledge, rain,happiness