What is the answer A B C OR D

[tex] \begin{array}{ccc}2l&-&\$2.80\\1l&-&\$1.40\end{array} [/tex]
[tex] 6\cdot\dfrac{1}{2}l=3l\\\\\begin{array}{ccc}3l&-&\$3.90\\1l&-&\$1.30\end{array} [/tex]
Answer: A. 2-liter bottle; $1.40