Final answer:
In R, B) print is a function to display data, C) + is an arithmetic function usable in a functional form, and A) C is incorrect as it does not represent a function due to the case sensitivity where a lowercase 'c' denotes a function for combining elements in R. Therefore, the correct answers are B) print and C) +.
Step-by-step explanation:
The question asks which of the following are functions in R: A) C B) print C) + D) All of the above. In R, which is a programming language used mainly for statistical computing and graphics, the term 'function' refers to a piece of code written to carry out a specific task. Each option given needs to be assessed to determine whether it is a function within the context of R.
B) print is indeed a function in R. It is used to display the content of an object or data structure. For example, if you have a vector named 'numbers', using print(numbers) would show the elements of that vector in the console.
C) + may seem like an operator, but in R, it is also a function. It is used for addition, and you can actually use it in a functional form, such as +(3, 4), which would return 7. Operators in R are functions with special syntax.
However, A) C is a bit tricky because 'C' as a single letter is not a function in R. The lower-case 'c' is a function used for combining multiple elements into a vector, e.g., c(1, 2, 3). Since the options seem to be case-sensitive, 'C' does not satisfy the requirement of being a function in R. Therefore, the answer is not 'All of the above' since 'C' is not correct in its provided form.