Danish 需在 09 30 报到上班。下表显示了他上班可以采取的不同出行方案。

	起点	终点	出行方式	时长
方案 A	家	换乘站	步行	15 分钟
方案 B	家	换乘站	公交车	10 分钟
方案 C	换乘站	工作单位	公交车	1 小时 20 分钟
方案 D	换乘站	工作单位	地铁	1 小时 10 分钟

今天早上，Danish 在 07 55 离开家，并在报到时间前 10 分钟到达工作单位。他选择了哪些出行方案？

1. Find the time Danish reached his workplace.

Reporting time is $09\ 30$. Reaching $10$ minutes before means he arrived at $09\ 20$.

2. Calculate the total duration of the journey.

From $07\ 55$ to $09\ 20$:
$07\ 55$ to $08\ 00$ is $5$ minutes.
$08\ 00$ to $09\ 00$ is $60$ minutes.
$09\ 00$ to $09\ 20$ is $20$ minutes.
Total duration = $5 + 60 + 20 = 85$ minutes.

3. Determine which combination of travel options gives a total of 85 minutes.

He must take one option from Home to Interchange (A or B) and one from Interchange to Workplace (C or D).
Option A + Option C = $15 + 80 = 95$ minutes
Option A + Option D = $15 + 70 = 85$ minutes
Option B + Option C = $10 + 80 = 90$ minutes
Option B + Option D = $10 + 70 = 80$ minutes
Since the total duration is $85$ minutes, he took Options A and D.