18. (continued) Consider the 1H-NMR spectrum of very pure Remdesivir. Presuming that Jab is sufficiently different from Jbc and that the instrument has sufficient resolving power. Assuming the maximum multiplicity of signals and non-superposition of peaks, what is the expected signal splitting pattern for each signal, in the order (Ha, Hb, Hc). Note: s: singlet, d: doublet, t: triplet, dd: doublet of doublet, dt: doublet of triplet (A) d, dd, dt (B) s, dd, dt (C) d, dd, d (D) d, t, d (E) s, t, dt