Jeff's family thinks that Jeff has been initiated into a gang. Which clue does his family most likely link to gang affiliation?

Jeff begins saving money for college tuition.
Jeff gets a tattoo of a specific nickname on his torso.
Jeff refuses to clean his room after being instructed to do so.
Jeff views internet sites that suggest his interest in extreme terrorism.

Jeff views sites that suggest his interest in terrorism

Explanation: saving money, getting a tattoo, and refusing to clean his room are all normal teenage behaviors

Jeff views internet sites that suggest his interest in extreme terrorism

Explanation:

just took test

to prevent people from getting the ebola virus, countries around the world paid to doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely.

what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

meditation is a practice of sitting still and quiet for minutes or even hours. it has been practiced for thousands of years and is even a part of religious practices for some people. carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that people connect with their current surroundings and activities.

are claims about the effects of meditation most likely scientific or pseudoscientific?

not pseudoscientific, because people have made claims about it but scientific observations have not been made