Simplicity is an example of an abstract noun. It is because
an abstract noun is a word to describe something that a person can’t use any
sensory functions in which simplicity is a way of having to describe someone
without having to use any functions.
The correct answer is D. simple.
A simple sentence contains only one independent clause. If a sentence has more than one independent clauses, then it's called a compound sentence. If it has one independent clause, as well as one (or more) dependent clauses, then it is a complex sentence. A run-on sentence is a grammatically incorrect sentence which combines two or more independent clauses with a comma only, rather than with a conjunction.
One instance of foreshadowing occurs when Emily Grierson buys arsenic from the pharmacist. According to the narrator, Emily is a haughty aristocratic who thinks she is better than most of the other townspeople. Emily uses her demeanor to bully the druggist into selling her poison.
Answer:
My family visited Washington D.C., and spent three days exploring The Smithsonian.