With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Theories in the beginning of January 2020 , stated that the most important source of infection of the coronavirus disease was human-to-human transmission .
text_B: According to this theory , the primary source of infection became human-to-human transmission in early January 2020.
SUPPORTS.