为异步方法编写包装器

我有一个TransactionOperator类，它暴露了以下静态异步方法:

public static async Task<bool> ProcessTransactionAsync(Transaction transaction)
{
    var someTransactionOperator = ...; // get appropriate operator
    // some code here
    bool success = await someTransactionOperator.Process(transaction);
    // some more code
    return bool;
}

现在，我想在Transaction类中提供一个包装器实例方法。我的问题是，哪一种写法是正确的/推荐的?我倾向于第2条，因为它感觉正确，但我没有任何支持这个选择的论据。

// Option 1
public bool ProcessAsync()
{
    return TransactionOperator.ProcessTransactionAsync(this).Result;
}
// Option 2
public Task<bool> ProcessAsync()
{
    return TransactionOperator.ProcessTransactionAsync(this);
}
// Option 3 (compiler warning because there's no 'await' operator)
public async Task<bool> ProcessAsync()
{
    return TransactionOperator.ProcessTransactionAsync(this).Result;
}
// Option 4
public async Task<bool> ProcessAsync()
{
    return await TransactionOperator.ProcessTransactionAsync(this);
}