"Animal testing has enabled the development of many life-saving treatments for both humans and animals. There is no alternative method for researching a complete living organism, and strict regulations prevent the mistreatment of animals in laboratories. What is this quote arguing?

A). Lab regulations are too strict for scientists.
B). Animal testing is bad and should not be performed.
C).Mistreatment of animals in labs is not an issue.
D).Animal testing is good and we should continue the process.

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.

answer: librarians is the correct word.

you should start by saying what they did to these subjects hope that this