When should scientific claims be questioned?
a. if you don t agree with them
c. if they are based on a very small sample
b. if they are hard to understand
d. if they are new

Generally all scientific views should be questioned, but this does not mean that they should be rejected.

If you don't agree with scientific claims, you can question them, and try to find more evidence but it's not yet good enough reason to reject them either.

If they are hard to understand, you should try to understand them better but not reject them either.

The weakest support for the view from the options is if it's based on a small sample - this is the best option.

The jugular vein located, on an animal, starts proximally at the base of the neck and moving towards the head along the jugular groove.