Answer:
The answer is A
Step-by-step explanation:
The full question is:
The popularity of cell phones has expanded among adolescents in the
past few decades as well, and now 78 percent of teens use cell phones."
Which type of evidence does the author use to support this claim?
a.Facts and statistics
b.Expert opinion
c.Anecdotal evidence
d.No evidence
Facts and statistics is usually identified by the use of numbers. In the claim above, the author clearly uses numbers to support what he says "...and now 78 percent of teens use cell phones."
The other options: expert opinion is usually represent the viewpoint of experts. Basically, the evidence will be something stated by an expert.
As for anecdotal evidence, this is an Informal way of gathering evidence and requires verbal testimonies and anecdotes.
We can't say no evidence was used because from what we can see, facts and statistics was used.
Therefore the answer is A.