Answer:
The participial phrase in the sentence is:
D. struggling with difficult personal decisions.
Step-by-step explanation:
A participial phrase is formed by a present or a past participle followed by pronouns, nouns, or phrases that complement what was said by the participle. Participial phrases function as an adjective, modifying a noun. In the case of the sentence we are analyzing here, the participle that begins the phrase is "struggling", which is a present participle. The phrase modifies the noun "woman", giving us further information about this person.