Question

with careful training, most dogs can be taught to follow spoken commands. to train your dog, you should begin by saying the word for a desired action, such as \come.\ next, you should give the dog a treat each time it completes this action. learning a new behavior can be hard work, so remember to give your dog lots of positive praise!
text 2
scientists have learned that dogs have the natural ability to understand finger - pointing. they made this discovery by placing bowls within view of stray dogs. when the scientists pointed to the bowls, they found that the dogs walked over to the bowls about eighty percent of the time. this shows that dogs can understand and respond to finger - pointing without any previous training.
which sentence best combines the main, or central, ideas of both texts?
though stray dogs cannot understand finger - pointing, most can be taught to understand spoken commands.
dogs must be trained to understand spoken commands, but most can understand finger - pointing without being taught.
stray dogs respond well to finger - pointing, and they are also naturally curious about scientists.
in order to train dogs more effectively, most scientists recommend using lots of positive praise.

Explanation:

• Text 1: Dogs can be trained to follow spoken commands (with treats/praise).
• Text 2: Dogs naturally understand finger - pointing (shown by experiment with stray dogs).
• Analyze options:
• First option: Wrong, Text 2 shows stray dogs DO understand finger - pointing.
• Second option: Correctly combines: Dogs need training for spoken commands (Text 1) and understand finger - pointing naturally (Text 2).
• Third option: "Naturally curious about scientists" is not in either text.
• Fourth option: Text 2 doesn't mention positive praise for training.

Answer:

B. Dogs must be trained to understand spoken commands, but most can understand finger - pointing without being taught.