Step 1: Understanding the Question
Let E be the amount of espresso and S be the amount of sugar. The total amount of the drink is T = E + S. The question asks for the ratio E:S.
Step 2: Analysis of Statement (1)
Statement (1) says that in a total drink of T = 35 ounces, the amount of sugar is S = 15 ounces.
Since the drink consists only of espresso and sugar, we can find the amount of espresso:
\[ E = T - S = 35 - 15 = 20 \text{ ounces} \]
Now we can find the ratio of espresso to sugar:
\[ \frac{E}{S} = \frac{20}{15} = \frac{4}{3} \]
So, the ratio E:S is 4:3. This provides a specific, unique answer to the question.
Therefore, Statement (1) ALONE is sufficient.
Step 3: Analysis of Statement (2)
Statement (2) says that in a total drink of T = 70 ounces, the amount of espresso is E = 40 ounces.
We can find the amount of sugar:
\[ S = T - E = 70 - 40 = 30 \text{ ounces} \]
Now we can find the ratio of espresso to sugar:
\[ \frac{E}{S} = \frac{40}{30} = \frac{4}{3} \]
So, the ratio E:S is 4:3. This also provides a specific, unique answer to the question.
Therefore, Statement (2) ALONE is sufficient.
Step 4: Final Answer
Since each statement alone is sufficient to answer the question, the correct answer is (D).