Google Professional Machine Learning Engineer
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A retail company is embarking on a machine learning project to enhance its marketing strategies by analyzing customer purchase history. The goal is to identify distinct groups of customers with similar buying patterns without relying on any pre-labeled data. This approach is expected to uncover hidden patterns and insights that can lead to more personalized marketing efforts. Given the company's constraints of limited labeled data and the need for scalability across thousands of customers, which of the following scenarios best exemplifies an unsupervised learning task in this context? (Choose one correct option)
A
Classifying customer feedback into positive, neutral, and negative categories using a dataset that has been manually labeled by the marketing team.
B
Developing a model to predict next month's sales figures based on historical sales data, promotional activities, and seasonal trends, where past sales figures serve as the labels.
C
Automatically grouping customers into segments based on similarities in their purchase history without any predefined labels or categories.
D
Training a model to identify potentially fraudulent transactions by using a dataset where each transaction is labeled as either fraudulent or legitimate.