Consider the following two types of non-identical sources:1. Voltage source e1(t) and e2(t)2. Current source i1(t) and i2(t)Regarding the mode of their connection in a circuit.

• A. 1 cannot be connected in parallel, and 2 cannot be connected in series
• B. 1 cannot be connected in series, and 2 cannot be connected in parallel
• C. Both 1 and 2 cannot be connected in series
• D. Both 1 and 2 cannot be connected in parallel