A problem

Let A and B be connected subsets of [0,1]² where π(A) = [0,1] = π(B) where π is the projection map π(x,y) = x. We construct a new set C out of A and B as follows.
Let C = {(x,y,z) | (x,y) ∈ A and (x,z) ∈ B}.

Is C connected always? If not then are there counterexamples?
Read below to see an answer.

Here is a counter example to the statement where the set C generated by A and B as in figure below, is not connected:

Now comes the interesting question. Given such sets A and B, can we always find a connected set whose projections are A and B respectively.? The answer is provided here at m.o.