Answer:
B. He should try to find a better website because this one is most likely not credible.
Step-by-step explanation:
Credible sites, in addition to value the truth of the information, values the appearance of the site and the security and operation of the computer of who is accessing the site.
Websites with a large number of advertisements are generally unreliable, make it difficult for the computer to be accessed, look uncomfortable, polluted and do not allow a user to do the research, as the number of ads makes it difficult.
When Roberto found this type of site, he should have suspected that the site is not credible as it was making it impossible for him to do his research.