Read the paragraph from a research-based informative essay on automated vacuum cleaners.

Automated vacuum cleaners are now commonly used appliances. They cruise around living spaces, cleaning up debris and occasionally getting stuck behind sofas. These vacuums remove—at least for the most part—the need for a human involvement from this chore. Now hotel chains may begin adopting these automated vacuums to help clean guest rooms and conference centers. In an interview, the general manager of the Star Hotel in Oʻahu, Hawaii, acknowledged that, these vacuums make the cleaning process more efficient for my staff. If hotels are using these automated vacuum cleaners, perhaps it won’t be too long before they begin to roam airports, restaurants, and even supermarkets.

How should the writer revise the paragraph to correctly integrate the cited research from the interview with the hotel manager?

by adding source information in parentheses at the end of the quote
by adding quotation marks around the direct quote from the manager
by adding the date and time of the interview with the manager
by adding a summary after the hotel manager’s direct quote