Which is true of the badly formatted code?

x $=$ input$()$

if x $==\text{'}$a$\text{'}$:

print$(\text{'}$first$\text{'})$

print$(\text{'}$second$\text{'})$if age $<18$:

x $=$ x $+5$

else:

x $=$ x $+1$

a$.$

x $=$ x $+5$ if age $<18$ else x $+1$

b$.$

x $=$ x $+5$ if age $>=18$ else x $+1$

c$.$

if age $<18$ x $=$ x $+5$ else x $=$ x $+1$

d$.$

x $=$ x $+1$ else if age $<18$ x $+5$