Alright, let's carefully analyze the options given for the age of a source to be considered current. The options provided are:
a. 10 years old
b. 5 years old
c. 1-2 years old
d. 3-4 years old
### Step-by-Step Analysis
1. Option a: 10 years old
A source that is 10 years old is generally not considered very current. Over such a long period, information can become outdated due to numerous advancements in any field.
2. Option b: 5 years old
While a source that is 5 years old might still contain relevant information, many fields experience rapid changes, and 5 years can lead to significant differences in data or conclusions.
3. Option c: 1-2 years old
A source that is between 1 and 2 years old is typically considered very current. The information is likely to be up-to-date and relevant, reflecting recent research, updates, or changes in the respective field.
4. Option d: 3-4 years old
A source that is 3-4 years old is somewhat current but not the most recent. Depending on the field, this age might still be acceptable, but generally, more recent sources are preferred.
### Conclusion
After evaluating each option, the best choice for a source to be considered current is:
Option c: 1-2 years old
Therefore, the best answer is C.
