Questions 15–23: rewrite each sentence in the tense indicated.

15. mona lisa smiles mysteriously. past:

What kind of words would be to find the information from a database about changes in height of an ocean surface over a 20 year period

Which describes an effective project plan? o a. the project plan uses abstract language to provide interesting descriptions. o b. the project plan uses researched sources to establish credibility. o c. the project plan uses information that is already known to the reader. o d. the project plan uses visual aids to guide the reader's understanding

Why would the author choose to use quotation from doctors and researchers in this article