Nearly all main border walls today use ________ filtering

Ryan has been appointed by Target Internationals, a hardware manufacturing firm, as a marketing researcher and has been asked to conduct a marketing research to produce new insights of consumer attitude on its vacuum tubes

Ryan begins with the research process by defining the problem, the decision alternatives, and research objectives. Mention the next step that Ryan will follow to continue with the research.

Ms. Turner ________ surprised to find out that I ________ from the same town she does

A) is/come B) was/had came C) is/had come D) was/come