Answer:
Jada drank less water than Elena
Explanation:
Elena drank three liters, and Jada drank 3/4 of that. Without even having to calculate anything, we can solve this.
Since 3/4 is less than one whole, and Jada drank 3/4 times what Elena drank, we instantly know that Jada drank less.
The part with Lin is just there to confuse you, it doesn't affect the question or answer in any way.