A) When there is a large amount of spammy or low quality backlinks

B and C are correct

A and B are correct

B) When you want to prevent or solve a manual penalty

C) When irrelevant or low quality backlinks are observed in a link profile, regardless of the quantity of links

Yes, it makes sense to compare them on a specific date because they give you a more complete picture of the affinity observed in the link profile.

It does not make much sense to compare them with each other, although it does make sense to see the evolution of each of them over time for a given project.

No, it does not make any sense, since they are proprietary metrics, each of them is obtained from a different methodology.

Google Optimize

Google Analytics

Google Search Console

Semrush

sponsored

acquired

UGC

nofollow

Assisted link building

PPC

Capitalizing on web mentions

Natural (editorial links)

All other options are correct

If the URL does not have a noindex directive applied

If the URL is blocked by their robots.txt

URL depth level in the referring domain

If the URL is indexed and appears in the search engine

Location and form of the link in the URL

No, it is a directive and as such Google respects it.

Generally no, but Google reserves the ability to do so if it deems it appropriate based on the type of link in question.

None of the other options is correct

Yes, since the directive tells the bots not to follow the link, but the authority transfer is done.

All other options are correct

Semantic proximity, understood as the thematic relationship between domains of the same industry

The anchor text used in the referring domain

The authority of the domain from which the link originates 

The authority of the domain to which the link goes

Majestic

All tools mentioned are useful for link building

Semrush

Ahrefs

Google Search Console

FID

FCP

LCP

CLS