C$.$ Resource constrains

D$.$ Technical constrains

Figure $1\mathrm{.}1$: AON network for the installation of new pipes for $10$ kilometers with a period of $30$ days.

$16.$ Referring to the above Figure $1\mathrm{.}1$: Use the Laddering approach and divide each work to $4$ segments $(2\mathrm{.}5$ kilometers each$).$ How many days does it take to complete the entire project?

A$.10$ day

$2.15$ days

C$.20$ days

D$.25$ Days

$17.$ Referring to the above Figure $1\mathrm{.}1$: Use the Laddering approach and divide each work to $4$ segments $(2\mathrm{.}5$ kilometers each$).$ On the $10$th day, what percentage of the total work has been completed?

A$.33\%$

B$.55\%$

C$.75\%$

D$.85\%$