21.(A) corroborated (B) bolster (C) recalcitrant (D) catalyst(E) contradictory (AB) grapple with (AC) exacerbated (AD) circumscribed(AE) ineffable (BC) remiss (BD) engenders (BE) supplants(CD) steer clear of (CE) motivated(AB) grapple with (AC) exacerbated (AD) circumscribed (AE) ineffable (BC) remiss (BD) engenders (BE) supplants (CD) steer clear of (CE) motivated