but would like to know how to access the data (see example A),

This is one of those moments when as an adjunct professor I always take time out to tell my students how the watch works before I tell them what time it is.

First off a quick review of what an array reference is:

# make an array reference:
my $ref = \@rry;
#
# or an anoonymous array: 
my $ref2=[ "stuff", "things", "goodies"];
</ocde>
If I have a function returning an arrey reference:
<code>
my $rows=$sth->fetchall_arrayref;
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Then to dereference it I would do the following:

my @array=@{$sth->fetchall_arrayref};
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But wait! If I am passing an array to HTML::Template's param method then I'm going to want to pass an anoymous array such as:

$template->param(selscene => [ @array ] );
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Hope my brain fried ramblings make sense and help...