An investor decides on an action based on the performance of a stock and the prevailing market trend. The following code accepts two string variables `stock` and `market` as inputs and prints the corresponding action as output. Which of the following statements about the code execution are true? The options are independent of each other.
```
1 stock = input()
2 market = input()
3
4 if stock == 'rising':
5 if market == 'bull':
6 action = 'buy'
7 else:
8 action = 'hold'
9
10 if stock == 'falling':
11 action = 'sell'
12
13 if stock == 'stable':
14 if market == 'bull':
15 action = 'hold'
16 else:
17 action = 'watch'
18
19 print(action)
```