Answer:
d. I'll buy that
Step-by-step explanation:
A sentence can be defined as a group of words that comprises of both a subject and predicate used to convey a logical information. Sentences are classified into four (4) main categories and these includes;
I. Simple sentence.
II. Compound sentence.
III. Complex sentence.
IV. Compound-Complex sentence.
The phrase which would follow the expression 'That's wonderful' is I'll buy that.
In English language, "That's wonderful" is an expression that indicates surprise and a sense of satisfaction after hearing about a particular thing, person or phenomenon.
For example, a salesperson might recommend a new product to a customer while stating all the benefits associated with the product. Then, the customer says; that's wonderful, I'll buy that product.