which two square roots are used to estimate the square root of 67

A.
[tex] \sqrt{36} \: and \: \sqrt{49} [/tex]
B.
[tex] \sqrt{49} \: and \: \sqrt{64} [/tex]
C.
[tex] \sqrt{64} \: and \: \sqrt{81} [/tex]
D.
[tex] \sqrt{81} \: and \: \sqrt{100} [/tex]