Which sentence from the introduction (paragraphs 1-5) offers an explanation for the researchers' findings?
(A) Scientists have worried that ancient redwood trees might also be at risk as
the planet heats up.
(B) But new research shows global warming may actually be helping, at least for
now
(C)
It may be that the trees prefer warmer temperatures, or that they are
benefiting from more sunlight or a longer growing season
"We're not seeing any evidence of declining growth rates," said Steve Sillett,
a forestry professor and nationally known U. S. redwoods expert
(D)