Which of the following growth$-$rate functions indicates a problem whose time requirement is independent of the size of the problem?

The following multiple$-$choice options contain math elements, so you may need to read them in your screen reader's $$reading$$ or $$browse$$ mode instead of $$forms$$ or $$focus$$ mode.

Choice $1$ of $6$:

$$

$($

$2$

$$

$)$

O$(2$

n

$)$

Choice $2$ of $6$:

$$

$($

$$

$$

$$

$$

$)$

O$($logn$)$

Choice $3$ of $6$:

$$

$($

$$

$2$

$)$

O$($n

$2$

$)$

Choice $4$ of $6$:

$$

$($

$1$

$)$

O$(1)$

Choice $5$ of $6$:

$$

$($

$$

$$

$$

$$

$$

$)$

O$($nlogn$)$

Choice $6$ of $6$:

$$

$($

$$

$)$

O$($n$)$