The answer is D.
Compound sentence uses one independent clause and one dependent clause. In option D, “after they finished studying” is the dependent clause. “Juan and Maria went to the movies” is the independent clause.
The following can be used <span>as a hook in the introduction of an informative essay:
</span>an analogy<span><span> -explanation of one thing in terms of another, comparison of two thing,the ways in which they are alike </span>are highlighted
a dictionary definition - the terms that are used in the essay can be defined with dictionary definitions
an in-depth analysis</span><span> - examination of the components of the object of interest</span>
