The following sentence $($a$)$ has been rewritten $($b$)$ to comply with academic standards. Indicate whether the rewritten sentence $($b$)$ illustrates tentativeness, acknowledgement, objectivity, formality or clarity.

a$.$ Studies show that trouble$-$shooting is an important skill for a software developer.

b$.$ As Johnson $(2019)$ points out "studies show that trouble$-$shooting is an important skill for a software developer" $($p$\mathrm{.}17).$

Select one:

a$.$ Acknowledgment

b$.$ Clarity

c$.$ Tentativeness

d$.$ Objectivity

Formality