Strongyloides stercoralis first-stage rhabditoid larvae are easily distinguished from Necator americanus (Hookworm) rhabditiod larvae by which of the following morphological characteristics?

(a) Long buccal canal, inconspicuous genital primordium, and measures 180-380 µm long by 14-20 µm wide
(b) Notched tail and no sheath
(c) Short buccal canal, prominent genital primordium, and measures 250-300 µm long by 17 µm wide
(d) Pointed tail and striated sheath