Question $35(2\mathrm{.}5$ points$)$

You are developing and will support a content management system for a local school

that plans to start delivering their programs $100\%$ online. Any updates that interfere

with availability must be made overnight, between the hours of $2$:$00$ am and $5$:$00$ am

$.$This is an example of $a(n)$ :

a$)$ external quality attribute

b$)$ business requirement

c$)$ user requirement

d$)$ functional requirement