Rounding a turnpoint in sink

Let's imagine the following scenario:

You are flying a comp and eager to win. This far you are really
doing well on today´s task.

You had a good climb some distance back and have left the main
gaggle behind. It looks like you might be in the lead. Now you
are approaching the second turnpoint and are bombing along
through the sink at, say 90 kts, roughly according to the
chosen McCready setting.

Now, when you reach the turnpoint, you need to turn 180 degs
and head back in the opposite direction. The turnpoint is in
the middle of a largish area of heavy sink.

What is the most effective technique for making the turn ?

a. Tight turn at the current speed (90 kts) and carry
on according to McCready.
b. Slowing down to thermalling speed, turning tight and
accelerating back to 90 kts. This would end up being
a kind of chandelle-like maneuver since you'd be
pulling up sharply, turning while still in the climb,
and diving in quick succession.
c. A half loop with a roll on top. OK, I suspect this
might be theoretically best, but let's suppose you
rule this out due to a load of loose objects in the
cockpit: maps, pen, camera, sandwiches, drinking
water etc. and you are not really into advanced
aerobatics anyway.
d. Carrying on for half a mile (or a mile ?) past the
turnpoint where a cloud is building and you expect
to find lift to turn in.
e. Anything else.

CV