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Which of the following code blocks returns a copy of DataFrame transactionsDf where the column...

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Which of the following code blocks returns a copy of DataFrame transactionsDf where the column storeId has been converted to string type?

A.

transactionsDf.withColumn("storeId", convert("storeId", "string"))

B.

transactionsDf.withColumn("storeId", col("storeId", "string"))

C.

transactionsDf.withColumn("storeId", col("storeId").convert("string"))

D.

transactionsDf.withColumn("storeId", col("storeId").cast("string"))

E.

transactionsDf.withColumn("storeId", convert("storeId").as("string"))

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