Q. Let N+ denote the nonzero natural numbers. Define a binary relation R on N+ × N+ by (m, n)R(s, t) if gcd(m, n) = gcd(s, t). The binary relation R is

• (A) Reflexive, Not Symmetric, Transitive
• (B) Not Reflexive, Symmetric, Transitive
• (C) Reflexive, Symmetric, Not Transitive
• (D) Reflexive, Not Symmetric, Not Transitive