How can you prove that J,H,G ≅ H,J,I
A - SAS
B - ASA
C - SSS
D - AAS

Given -
A parallelogram with sides G, H, I and J in which GH = IJ and GJ = HI.
To prove -
J, H, G ≅ H, J, I
Proof -
In ∆ JHG and ∆ HJI,
GH = IJ (S)
GJ = HI (S)
JH = JH (common) (S)
J, H, G ≅ H, J, I (SSS congruency rule)
C. SSS