To solve this question, the user needs to know the definition of vowels and identify the seventh vowel in the given sentence.

The vowels are a, e, i, o, and u.

Now, let's count the vowels in the sentence to determine the seventh vowel:

"The seventh vowel appearing in this sentence is the letter __________."

There are a total of 19 letters in this sentence. Counting from the beginning, we have:

1. "The" - no vowels
2. "seventh" - two vowels (e, e)
3. "vowel" - two vowels (o, e)
4. "appearing" - three vowels (a, e, i)
5. "in" - one vowel (i)
6. "this" - one vowel (i)
7. "sentence" - three vowels (e, e, e)

Therefore, the seventh vowel appearing in this sentence is the letter "e".

The Answer is: B.

Let's reevaluate the given information:

Frank is taller than John. Ralph is taller than Frank. Since Ralph is taller than Frank and Frank is taller than John, we can infer that Ralph is also taller than John. Therefore, Ralph is the tallest, while John remains the shortest among the three individuals.

Hence, the correct answer is option D: John.

To determine the total number of legs, we need to multiply the number of each animal by the number of legs each animal has, and then add them all together.

Given that:

• Each horse has 4 legs
• Each person has 2 legs
• Each dog has 4 legs
• Each chicken has 2 legs

We can calculate the total number of legs as follows:

Number of horse legs = 5 horses * 4 legs per horse = 20 legs Number of people legs = 2 people * 2 legs per person = 4 legs Number of dog legs = 3 dogs * 4 legs per dog = 12 legs Number of chicken legs = 7 chickens * 2 legs per chicken = 14 legs

Total number of legs = 20 + 4 + 12 + 14 = 50 legs

Therefore, the correct answer is B. 50.