What are they doing?

When I started my last Nematode hunting I was like.. "another boring, cornea bleeding work".. THEN! I met them! (parang close na close lang eh. :D)

WHAT ARE THEY DOING?
Are they:
(a) Copulating
(b) Single nematode undergoing shedding
(c) Nematode 1 eating nematode 2

(d) None of the above (supply your answer)

Hey! Please comment your answer below! 

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Thanks! ☺