What would be the output of the following code?

x <- c(3, 5, 1, 9, 2) diff(x)

a.

[1] -2 4 -8 7

b.

[1] -2 4 8 -7

c.

[1] 2 -4 8 -7

d.

[1] 2 -4 -8 7