There's not an answer with "McCready" in it anywhere?
The answer from an XC perspective is to fly the appropriate McCready speed
in order optimize the total distance you can cover in your soaring day.
Answer "A" means you arrive at the next thermal with the maximum possible
altitude retained--not likely a goal of anything but the most conservative,
short XC flight.

wrote in message
ups.com...
80) What is the approximate proper airspeed to use when flying between
thermals on a cross-country flight against a headwind?

a) The best lift/drag speed increased by one-half the estimated wind
velocity.
b) The minimum sink speed increased by one-half the estimated wind
velocity.
c) The best lift/drag speed with no regard to wind velocity.

The SAA safety site gives the correct answer as "A". I have alway
heard that when flying between clouds you did not consider the wind in
your calculations. Maybe the tricky part of this question is the word
"Thermals".