1.
Yossi Klein asks:
>>1. How can an Avoda Zara become Nisbatel?
a) A Jew must be Mevatel it.
(b) Whenever a Nuchri adult says that it is Batel.
c) Any Nuchri can be Mevatel it.
d) A Jew and Nuchri must be Mevatel it together.
e) Machlokes A and B.<<
Not sure what's the difference between B and C.
2.
The Kollel replies:
According to B only an adult Nochri can be Mevatel, while according to C even a minor Nochri can be Mevatel.
Kol Tuv,
Dovid Bloom