Question: Plotting three objects, two on the same graph and the third on a different graph

Say I have three (3d if it matters) plot objects, which I will call A,B,C.

I need to plot A and B on the same graph and C on a different graph.

To plot objects on different graphs I would normally use an array of plots, and to plot objects on the same graph, I would use a set of plots. So what comes natural to me is this:

V:=Array(1..2):

V[1]:={A,B}:
V[2]:=C:

display(V)

However, this results in

Error, (in plots:-display) element 1 of the rtable is not a valid plot structure

 The problem is in the first element V[1] - Maple wants a plot, and not a set of plots, as each element of the array.

Another attempt which fails is the following:
 

display({A,B},C)

Here Maple will only plot {A,B} and ignore C.

I have had limited success with

 
display({A,B}), display(C)

which in fact works for the purpose stated above - it will produce the plots of {A,B} and C side by side.

However, when I try to put the above command within a procedure depending on some parameter, and use the Explore parameter to visualize the plots in dependence of the parameter, this does not work anymore. Maple will not produce any plot and will produce a wall of text within the Explore display.

For istance, 

with(plots); with(plottools)
display(circle([0, 0], 1)), display(circle([0, 0], 1))

Will produce the pictures side by side as desired. But:

P := proc (a)
display(circle([0, 0], 1)), display(circle([0, a], 1))
end proc:
Explore(P(a), parameters = [a = -1 .. 1])

Will result in a wall of text within the Explore window that begins like this:

So, is there a way to produce the plots I need which is compatible with the Explore command for a procedure? Ideally I need the two graphs ({A,B} and C) side by side within the same Explore window so that when I vary the parameters, both plots change accordingly. 

Thanks in advance.