Current with an ionic solution For the last assignment of the school year, my science teacher gave the class questions about chem, physics, etc. The third question had me confused and I'll be thankful for all the help given. The question is:

An ionic solution is created and tested to see how much current can go
through it. Two groups are told to create the following solution
consisting of $\pu{1.0 +/- 0.1 L}$ of water and $\pu{2.0 +/- 0.2 g}$ [of what?] . The battery used for the test is $\ce{8 +/- 1 V}$.
Group A measures a current of $\pu{2.1 +/-0.1 mA}$.  Group
B measures a current of $\pu{3.4 +/- 0.1 mA}$.
Describe 3 possible reasons why Group B measures a current greater
than group A.
No offence to you (certainly to the original author of this question), I call such home-work questions such as garbage in-garbage out type questions. No wonder a student will be confused if they see such open ended questions. The reason is that the author is not telling you or us of 2.0 grams of what?
Even if we assume it was 2 grams of salt, several things can affect the measured current
(1) What are the electrode areas?
(2) What are the electrodes made of?
(3) What is the distance between the electrodes?
Last but not the least, the identity of the salt matters a lot. Did both groups use the same salt? Monovalent, divalent, etc