閱讀下文，回答第47－50題

A research team at the Massachusetts Institute of Technology (MIT) has developed a new way to repair damaged paintings using artificial intelligence (AI). Normally, human experts fix paintings slowly by hand. They study each damaged area, match colors, and fill in cracks or missing parts. Some artworks can take weeks or even years to restore. Experts must also know perfectly well about an artist's style to keep his or her painting authentic.

The AI method is much faster and goes through a different process. First, the computer scans a painting and finds all damaged areas automatically. Then it creates a digital "mask" that marks the exact spots needing to be repaired. This mask is printed on a thin polymer film, which is placed over the painting to guide the restoration material while protecting the original surface. If necessary, the film can be removed, and the artwork stays safe and unchanged. The AI also saves a digital copy of the mask to help future experts understand the restoration work. In one test, the system identified more than five thousand damaged spots and matched tens of thousands of colors in only three and a half hours.

Even with AI, human experts remain important. They check whether the AI's work respects the artist's style. This AI method may help museums bring damaged paintings out of storage and show them to the public again. It may also create new jobs for people interested to become digital restoration specialists and AI art technicians. Combining AI and human skill shows how technology can support art, protect cultural heritage, and give people new ways to enjoy and learn from old artworks.

47. According to the passage, why does traditional restoration take a very long time?

(A)Experts must create a new way to fix the painting.

(B)Experts must print a film and place it on the artwork.

(C)Experts must write a report for future restoration work.

(D)Experts must check damaged areas and match colors by hand.