Respuesta :

WojtekR
A.

[tex]5-1=\boxed{4}\\\\10-5=\boxed{5}[/tex]

Not an arithmetic sequence.

B.

[tex]-27-(-20)=-27+20=\boxed{-7}\\\\-34-(-27)=-34+27=\boxed{-7}[/tex]

An arithmetic sequence.

Answer B.