With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: The first competitions to offer prize money were the National Snurfing Championship, held at Muskegon State Park in Muskegon, Michigan. In 1979, Jake Burton Carpenter, came from Vermont to compete with a snowboard of his own design. There were protests about Jake entering with a non-snurfer board. Paul Graves, and others, advocated that Jake be allowed to race. A "modified" "Open" division was created and won by Jake as the sole entrant. That race was considered the first competition for snowboards and is the start of what has now become competitive snowboarding. Ken Kampenga, John Asmussen and Jim Trim placed 1st, 2nd and 3rd respectively in the Standard competition with best two combined times of 24.71, 25.02 and 25.41 and Jake Carpenter won prize money as the sole entrant in the "open" division with a time of 26.35. In 1980 due to a lack of snow at the original site, the event moved to the Pando Winter Sports Park near Grand Rapids in the same state.
text_B: Is it plausible that environmental activists were using the conditions at Muskegon as a way of raising awareness of global warming?
YES.