C/A (it all depends on the actions and athlon has no HT, altough that is hard to find in P4's in laptops)
B
See this <A HREF="http://forumz.tomshardware.com/mobile/modules.php?name=Forums&file=viewtopic&p=3668#3668" target="_new">thread </A>Intel does have P4m cpu's with HT enabled.
I was not aware they had released HT enabled P4m processors.
Intel has two varities of P4m processors.
The ones with HT enabled are:
3.20 GHz, 3.06 GHz, 2.80 GHz, 2.66 GHz
The ones without HT enabled are:
3.06 GHz, 2.80 GHz, 2.66 GHz, 2.40 GHz