Explanation:
The correct answer is option C: Or.
Here's why:
- The sentence is expressing two possible options: going by bus and walking.
- The conjunction "or" is used to present alternatives or choices.
- The word "or" indicates that the two options are mutually exclusive, meaning that only one of the options can be chosen.
Therefore, the correct conjunction to complete the sentence is "or" as it accurately conveys the meaning of presenting alternative choices.

Answer:

To determine the correct answer to the given question, we need to understand the meaning and usage of each option.

The options are:
a) And
b) But
c) Or
d) So

Meaning and Usage of Each Option:

1. And: The word "and" is used to connect words, phrases, or sentences that have similar ideas or meanings. It is used to indicate the continuation or addition of something.

Example: I like to read books and watch movies.

2. But: The word "but" is used to connect two contrasting ideas or statements. It is used to introduce an unexpected or opposite statement.

Example: I wanted to go to the park, but it started raining.

3. Or: The word "or" is used to present alternatives or choices. It is used to indicate that only one of the options can be chosen.

Example: You can have an apple or an orange.

4. So: The word "so" is used to show a consequence or result. It is used to connect a cause and effect relationship.

Example: It was raining, so we decided to stay indoors.

Explanation of the Correct Answer:

The correct answer to the given question is option 'c' - Or.

The sentence "We can go by bus ________ we can walk" presents two alternatives or choices - going by bus or walking. The word "or" is used to indicate that only one of these options can be chosen. Therefore, the correct word to fill in the blank is "or".

Example: We can go by bus or we can walk.

This sentence implies that we have the option to either go by bus or walk. It does not suggest any continuation, contrast, or consequence. Hence, the correct answer is option 'c' - Or.