Which of the following are true

Which of the following are true?

Select ALL statements that apply. a. It is possible to add all the items from a list to another list. b. Once an item has been added to a list, it cannot subsequently be removed. c. Lists can only contain numbers. d. Lists can only contain letters.

The correct answer and explanation is:

The correct answer is a. It is possible to add all the items from a list to another list.

Explanation:

1. Option a: It is possible to add all the items from a list to another list.
   • This statement is true. In many programming languages, such as Python, you can add all the items from one list to another. One way to do this is using the .extend() method, which appends all the items from one list to another. For example, if you have a list list1 = [1, 2, 3] and list2 = [4, 5], calling list1.extend(list2) will result in list1 becoming [1, 2, 3, 4, 5]. This operation does not create a new list but modifies the original one.
2. Option b: Once an item has been added to a list, it cannot subsequently be removed.
   • This statement is false. Items that have been added to a list can be removed at any time. For example, in Python, the .remove() method or .pop() method can be used to remove elements from a list. The .remove() method removes the first occurrence of a specified value, while .pop() removes an item by index. So, lists are dynamic and mutable, meaning you can add, remove, or modify items as needed.
3. Option c: Lists can only contain numbers.
   • This statement is false. Lists can contain any type of data, not just numbers. For example, a list can contain strings, integers, floats, or even other lists. For example, my_list = [1, 'hello', 3.14, [2, 3]] is a valid list. Lists are versatile and can hold heterogeneous types of data.
4. Option d: Lists can only contain letters.
   • This statement is also false. As mentioned earlier, lists can contain a variety of data types, not just letters or strings. A list could hold integers, floating-point numbers, boolean values, and even complex objects. For example, letters = ['a', 'b', 'c'] is valid, but a list can also be mixed_list = [1, 2.5, 'text', True].

In summary, the only correct statement is that it is possible to add all items from one list to another.