Which of the statements below about magnetic induction tomography (MIT) and transcranial magnetic stimulation .(TMS), studied in Section $18.6,$ are true?
(a) Both MIT and TMS have source currents in coils, source magnetic fields, and induced currents.
(b) MIT detects the induced magnetic field produced by the induced current, and TMS does not.$
(c) MIT provides information directly about the imaged area, whereas 'TMS disrupts some brain activity, and the disruption is measured in some other way.
(d) a and conly $\quad(\text { e })$ a, b, and $c$